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Re: [48/77] Make subroutines of num_sign_bit_copies operate on scalar_int_mode


On 07/13/2017 02:55 AM, Richard Sandiford wrote:
> Similarly to the nonzero_bits patch, this one moves the mode
> class check and VOIDmode handling from num_sign_bit_copies1
> to num_sign_bit_copies itself, then changes the subroutines
> to operate on scalar_int_modes.
> 
> gcc/
> 2017-07-13  Richard Sandiford  <richard.sandiford@linaro.org>
> 	    Alan Hayward  <alan.hayward@arm.com>
> 	    David Sherwood  <david.sherwood@arm.com>
> 
> 	* rtlanal.c (num_sign_bit_copies): Handle VOIDmode here rather
> 	than in subroutines.  Return 1 for non-integer modes.
> 	(cached_num_sign_bit_copies): Change the type of the mode parameter
> 	to scalar_int_mode.
> 	(num_sign_bit_copies1): Likewise.  Remove early exit for other mode
> 	classes.  Handle CONST_INT_P first and then check whether X also
> 	has a scalar integer mode.  Check the same thing for inner registers
> 	of a SUBREG and for values that are being extended or truncated.
OK.
jeff


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